bash magic

cheatcheat.md

Cheatcheat

This is where i write down usefull commands i keep forgetting

Bash

Recursive dos2unix

find . -type f -print0 | xargs -0 dos2unix

List file extensions This commands lists all the different extensions recursively and shows how many files with that extension there are.

find . -type f | sed 's/.*\.//' | sort | uniq -c

Bulk renames file extensions recursively

find . -name "*.t1" -exec rename 's/\.t1$/.t2/' '{}' \;

Finds and deletes a file

find . -name "*.bak" -type f -delete

Finds a file

find . -type f -name "*.accurip"

Convert putty to openssh

ssh-keygen -i -f ding > ding2

Get window WMClass attribute

xprop WM_CLASS

Multithreaded xz archiving

target=foldername
tar cf - ${target} | pv | xz -T7 -z - > ${target}.tar.xz

Multithreaded gz archiving

target=foldername
tar cf - ${target} | pv | pigz > ${target}.tar.gz                       

Get parent process

ps -o ppid= -p 48217

XFCE

Change lockscreen command

xfconf-query -c xfce4-session -p /general/LockCommand -s "i3lock -u -i /home/philip/.lockscreen.png -c 000000" --create -t string

Selinux

Change ssh port

semanage port -a -t ssh_port_t -p tcp 1337

Powershell

Powershell loop

while($true){nmap 192.168.1.0/24}

"wget"

Invoke-WebRequest -Uri "url" -Use BasicParsing -outFile C:\ProgramData\ssh\sshd_config

"cat"

type file.txt

Unzip

Expand-Archive -LiteralPath 'C:\Build-Server.zip' -DestinationPath 'C:\'

Import aws module

Import-Module AWSPowerShell

Get file from aws s3 bucket

Read-S3Object -BucketName "mufasa-buildserver" -Key "Build-Server.zip" -File "C:\Build-Server.zip"

Add firewall rule

New-NetFirewallRule -Name sshd -DisplayName 'OpenSSH Server (sshd)' -Enabled True -Direction Inbound -Protocol TCP -Action Allow -LocalPort 22

Execute a script from the internet

Set-ExecutionPolicy Bypass -Scope Process -Force; iex ((New-Object System.Net.WebClient).DownloadString('https://blabla/ding.ps1'))

Append to path

$env:Path += ";SomeRandomPath" 

Replace path

$env:Path = "SomeRandomPath";

Modify a system environment variable

[Environment]::SetEnvironmentVariable
     ("Path", $env:Path, [System.EnvironmentVariableTarget]::Machine)

Modify a user environment variable

[Environment]::SetEnvironmentVariable
     ("INCLUDE", $env:INCLUDE, [System.EnvironmentVariableTarget]::User)

Add to the system environment variable

[Environment]::SetEnvironmentVariable(
    "Path",
    [Environment]::GetEnvironmentVariable("Path", [EnvironmentVariableTarget]::Machine) + ";C:\bin",
    [EnvironmentVariableTarget]::Machine)

[Environment]::SetEnvironmentVariable("Path", $env:Path + ";C:\bin", "Machine")

Check if script is being run with admin privileges

if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Write-Host "Please run as Administrator!" -ForegroundColor red
}

MegaCli

MegaCli is LSI's command line interface to their MegaRAID controller family

View information about the battery

MegaCli64 -AdpBbuCmd -aAll

View information about virtual disks

MegaCli64 -LDInfo -Lall -aALL

View information about physical drives

MegaCli64 -PDList -aALL

Configure write-cache to be disabled when battery is broken

MegaCli64 -LDSetProp NoCachedBadBBU -LALL -aALL

Check disk rebuild

MegaCli64 -PDRbld -ShowProg -physdrv[245:11] -aALL

Mark HDD offline

MegaCli64 -PdOffline -physdrv[245:13]  -aALL

Mark HDD missing

MegaCli64 -PdMarkMissing -physdrv[245:13]  -aALL

Read HDD params

MegaCli64 -CfgDsply -a0 | less

Replace missing HDD

MegaCli64 -PdReplaceMissing -physdrv\[245:13\] -array0 -row13 -a0

Start rebuild

MegaCli64 -PDRbld -start -physdrv[245:13] -aALL

Change rebuild rate

Get rebuild rate

MegaCli -AdpGetProp RebuildRate -a0

Change rebuild rate

MegaCli -AdpSetProp RebuildRate 25 -a0

Change physical disk cache policy

Disable the physical disk cache

MegaCli -LDGetProp -DskCache -LAll -aALL

Enable the physical disk cache

MegaCli -LDGetProp -DskCache -LAll -aALL

Rebuild process update

One line

while true; do MegaCli64 -PDRbld -ShowProg -PhysDrv [:07] -a0; sleep 120; clear; done

Script

#! /bin/sh

while true; do
        MegaCli64 -PDRbld -ShowProg -PhysDrv [:07] -a0
        sleep 120
        clear
done